Pinpoint Test E : Drive Modes Cannot Be Changed Using The Drive Mode Switch: Notes
Refer to Vehicle Dynamic Systems for schematic and connector information.
Normal Operation and Fault Conditions
The drive mode switch is hardwired to the GFM2, when the switch is pressed, a ground signal is sent to the GFM2. The GFM2 responds by sending a drive mode button pressed message to the IPC by way of the BCM as gateway module. The IPC controls the settings of the drive modes and responds by sending a drive mode change message to the PCM, GFM2, ABS module, PSCM and the AWD relay module. The GFM2 then responds by modifying the voltage output to the damper valve solenoids and the other modules respond to the message by modifying their operation according to a programmed set of instructions.
When a drive mode fault occurs, the GFM2 sends a message to the BCM over the HS-CAN which relays the message to the IPC. The IPC displays a drive mode fault message in the message center as long as the fault is present. If a fault is present and the drive mode or ride control switches are pressed, the system attempts to change modes, but resets back to Normal mode until the fault is repaired and the DTC is cleared.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P05D0:24 | Driver Mode Select Switch "A" Circuit: Signal Stuck High | This DTC sets in continuous memory if the driver mode switch input is active for more than 60 seconds. This can be due to an internal short in the drive mode switch, a short in the drive mode switch circuit or an object keeping the switch in the applied position. |
Possible Sources
- Wiring, terminals or connectors
- Drive mode switch
- GFM2